In terms of how this may work, most cars have a CAN-bus (or a few) which is basically a stream of events which happen in a car. For example when you press the v

In terms of how this may work, most cars have a CAN-bus (or a few) which is basically a stream of events which happen in a car. For example when you press the volume down button on the steering wheel it sends a message on the bus, then the radio receives it and turns the volume down. The same is true for most things in the car, so all Tesla needs to do is attach a device to the bus which logs everything. Other car companies could do the same relatively easy.